Ski-cutting machine



July 1, 1930. .1. E. ERICKSON SKI- CUTTING MACHINE Filed April 11, 1929 7 Sheets-Sheet Frat/man. ow-J MM 1ft forrzegs.

r o m m I Julyl, 1930. J. E. ERICKSON SKI CUTTING MACHINE med April 11, 1929 '7 Sheets-She a;

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In ven for". (75/212 E Erickson.

MM 1' torn eys.

July 1 ,-1930. J. E. ERICKSON SKI CUTTING MACHINE Filed April 11, 1929 7 Sheets-Sheet I n Wen for: (76/112 E EPIC/(Son.

4 flzfornegs July 1, 1930. I ERlCKSON 1,769,125

SKI CUTTING MACHINE L I 12 van for: J5/m E Ermkson.

Kttorneys.

July 1, 1930.

J. E. ERICKSON' SKI- CUTTING MACHINE;

Filed'April' 11, '1929 7 Sheets-Sheet 5 In van for: Jbhn E Erickson.

ttorneys.

July 1 1930. I J, ERICKSQN 1,769,125

SKI CUTTING MACHINE Filed Apfil-IL- 1929 Sheets-Sheet 6 In ventor: Jbl'm E Erickson y 1930. .1. E. ERICKSON sKi CUTTING'MACHINE cated above by a rot I detailed} description thereof 35 enlarged. scale in verticalse Patented July 1, 1930 l JOHN-E. nRIcKsoNjoF ST. PAUL, MINNESOTA I r J sKLoUmTInG 3 MACHINE lpplication" filed April 11,

My invention relates to ski cutting machines, and an object is to provide amachine which will automatically cut into the upper surface of wooden slabs or blanks from which the skis are made, in such manner that the two endportions of the ski 'will'be much thinner thanthe central portion whereby the ski is given the desired flexibility. Another ob ject isfto provide'a nachine of this character which may be readily utilized to thin the, forwardand rearward portions of'skis hav ing different lengthsi Another object is to provide means for firmly holding the blanks while they are'beingcutin themanner indiary'cutter so as to pre ventchatteringof the blank'and consequent imperfect'cutting thereof. The full objects and advantages of my invention will appearin connectionwith the and the novel features ofmy inventiye'idea will be particu-' larly pointed outin the claims. In-the accompanying drawings which illustrate a practical embodiment of my invention,'Fig. l is a top plan view of the machine.

a Fig. 2 isa'side elevational view thereof. Fig 3 is a view'onan enlarged scale 1n vertical section on the line 33 of Fig.1. Fig. 4is

a view on an enlarged scale in vertical section on the lineal- 4 of Fig. 1. Fig. 5 is a view in vertical section on the linev 55 of Fig. 1. Fig. 6 isa View in vertical section constituting an extension for the lefthand uportionfof Fig. 3; Fig.7 is aviewonE-a'n ction on. the line 7,7 of Fig. 1. Figl 8 is a view on anen larged scale in vertical 'sectionon the line 88 of -Figjl. f Fig.9 is a view 'in transverse vertical section substantially." on the line, 9 9

: QfFigsP; and'10. lO i'sa view in hori-I zontal section on the line 10:510 of Fig. 9Q Fig.11is'asi from which'the ski is formed.

Referring to' the drawings, a will befseen a I V gmeans o'f -j'a long tudinal"trackumember 84c that "the reris .a main frame designated.

' general .by the f numeral 12' twhich carries the supports andbearings for the pva'rious artsoffthemachine. As -bestshown in V H V p i l constitutes a support'for the blanlrgB. The

Fig. If, a pulley 14 on the shaft" of anelectricf motor 16 i connected b a belt 18 withia gear i l'secured to a-shaft 48 secured tothe shaft'eii meshesflwith'a to the shaft 40.. A;

40 near-the en which-carries the "around fthef sprocketi chains ei elevationallview of-a blank j y 11 .8 which 1929. Serial Nb. 354,339.

pulley 20-secured to a shaft 22. pulley 24 secured to the outer end of the shaft22 is connectedby a belt 26 withIa pulley 28 securecljtof asleeve 30 rotatably mounted on a fixed shaft 31; as shown inFigs. 1 and 2. A pulley 32 secured to theouter end of the sleeve 30'is connected by a belt 34 with a pulley 36 secured to a sleeve 38'rotatably mounted on a shaft 40. A small-gear 42 secured to the sleeve 38 meshes withfa large large gear 5 0jsecured small-gear 52 secured to the shaft 40 meshes witha' largegear 54 loose on, the shaft 46. The; gear 54 meshes witha still larger gear 56gsecuredto' a shaft .58 as shownin Fig. 1.

'34 instea'dof passing directly from The belt e the pulley 32- to the p'ulley36 is looped underneath a pulley'fiO as bestshown in vFig. 2, the pulley'6O being secured to one end of ashaft 62. flsmall'ge'ar 64;. secured to the a meshes with marge gear 66' secured to anshaft 68 asshown inFig. 1. {A pair'of sprocket wheels 7 0 are securedto the shaft d thereof i opposite the end sleeve 38 as will beunderstood fromFigs. l' and 3. A pair of sproc'ket chains 72 aretrained, around the sprocket wheels'70 andaround a pair offsprocket wheels 74'm'ounted in a support 76. carried bythefrjont ofthe frame 12 as will be .under stoodffrom Fig.6." The bearings forthe sprocket wheels 74 are provided with j custernary takeu'p fdevicesj78'. intervals 72, agpair of links thereof are connected cross. plates 80 'whichare attached asfshowninfFig. 9.;

referring 'toFig.'3', it' will-be understood thatthecross plates 80 engage; the rear ends 3 it of blanks B and feed these blanks under a later. 13y: referring to be seen that ltra ckways "are provided by 46. A small gear will be referred-1m rig eande, a will secured'tdtl e frame? as shown in Fig. 7 and hers" 86connected by a web member 88 which members 86 arehollowed out from their uphar-haetwe aewriwar diy projecting 'mmz with a gear 106 will be understood from Figs. 4 and 5,-theper sides and have lateral grooves 90 which receive inward projections 92 carried by the links of the chains. In order to aid in holding the blank B down as it passes under the rotary cutter 82, pairs of rollers 94 and 96 are provided which are rotated counterclockwise as viewed in Fig. 3 and engage the upper margins of the blank B as shown in Fig. 1. The'rollers 94 and 96 are rotated in the proper direction on account of thelr being secured respectively to shafts 98 and 100 which at their ends opposite the ends which carry the rollers are provided with gears 102 and 104 respectively which mesh secured'to the shaft 68. As

shaft'98 hasa bearing in a member 108 pivoted at 110 while the shaft 100 has a bearing ina member 112 pivoted to the member 108 byapivot 114. The free end of the member 112 provided with an adjustable screw bolt 116, the lower end of which is adapted to rest upon a'iixed portion of the frame. The rolls 94. and 96 are held down upon the blank by means of a rod 118, the upper end of which is. attached to themember 112 and thelower. end of which is pivotally attached to the intermediate portion of an arm 120 which at one end ispivotally attached at 122 and whose other end carries a counterweight, 124. The shaft 22 instead of being mounted in bearings fixed on the frame, is mounted in movable bearings 126, 127, and 128 best shown .in Fig. 7. Thebearings 127 and. 128are carried by the rear portion of a'casting 130, theforwardend of which is pivoted on the fixed shaft 31 as will be understood from Fig. 1 and the forward end of which carries an adjustable screw: 131 whose lower end engages thetrack at theside of the blank and prevents the casting from, dropping; too far as will be understood from Figsli2'andj4, A member 132 is secured to the casting 130 by ascrew bolt 134. By referring to Fig. 8, it will be seen thatthe bearmg 126 .is heldin a clamp constituted by a split hollowaportion of the member 182, the split portion of this clamp being held upon the bearing 126 by a screw bolt 136. Yoke members 138andl40 extend around the bearing 126at the two opposite sides of a the member132. A bolt 141 passing through the member-138- and screwed into; the member 1401 serves. to rotatablysupport aroller between these two members. A screw bolt 1144 passing throughthe .body;portion 1 of themember 132- and engaging in a recess inthe yoke membersprovides for adjustment ofthe position of the member 132 when the screwbolt 136is loosened. I Byreferringtof Fig. 3, it will beseen thatthe yoke membersv I V V the'inember174'from dropping too far. As

7 just refer ed=to are carried by the upper end of an arm 146 whose lower end is connectedv by a pivot 148 to one end of anarm" 150 carried by the lower rear portion of the frame. By referring to Figs. 2 and 7, it will be seen that the bearing 128 has depending ears 154 to which the'upper end of a rod 156 is pivoted. 156 is pivotally attached by a pivot 157 to one end of an arm 158 whose other end is connected to said rod. On account of the tie connection provided by the arms 146 and 150 and by the rod 156 and the arm 158, it will be obvious that the shaft 22 carrying the rotary cutter 82 will be caused to assume parallelpositions as it swings up and down.

By referring to Fig. 2, it will be seen that a lever 160 intermediately pivoted at 162 to the frame 12 has a short arm which en gages under the pivot 157 as best shown in Fig. 7, there being a counterweight 164 secured to the outer end'of the long arm of this lever. The weight 164 partly counterbalances the shaft 22. Secured to an end of the shaft 58, there is a wheel 166 to the periphery of which an arouate cam member 168 is detachably secured by 'means of screws as shown in Fig. 3. The

ski which may be desired. Referring to Fig. 3, in which the wheel 166 rotates in the direction indicated by the arrow, it will be seen that the-upper end of the member 168 has a hump 170 whichat this time by its engagement with the roller 142 will lift the cutter 82 from-engagement with the blank B ,so thatthe front end of the latter will be left with a short uncut portion F as shown in- Fig.11.

As soon as the roller 142 drops behind the hump 170, the. cutter 82 begins to cut into the upper surface ofthe blank. The cam memher 168 gradually increases in thickness toward itsmiddleportion 17 2 and then gradually decreases in thickness toward its other end, The result is that the blankas shown in Fig. 11 hasa middle portion M which is only slightly out andhas end portions P and P whichare out quite thin,the line of cut into the upper surface of the blank being indicated by the. dotted line; Inorder to assist in holdingdown the blank 1351618 being cut, a mem.-.

her 174 is provided for engaging theupper surface'of the blank. The member 17.4 carries. an offset portionprovided 'withan adjustables crew 176, whose. head is adaptedto theside of the track and prevent engagefatf will be'understood from Figs. 4 and 5, the member'174 has a curved extended portion 8fhaving downwardly extending ears 180 The lower end of the rod forwardly from. the rod clines upwardlyas shown in Fig. 3. Thecam- 7 limited on account of mounted on a pivotipinj 182. From the other side of the member 174, a stem 184 extends forwardly and carries a -weight 186. In order to prevent chattering of the ski as itis leaving the cutter, the following mechanism is provided. The shaft 58 as before stated carries a gear Wheel 56. Tooneface of this wheel, a cam 190 is secured'as will be understood from Figs. 5 and 7. Resting against the cam 190, there is a roller 192 carried by the lower end ofa lever 194 intermediately pivoted at 196 as shown in Fig. 5. The lower end of an arm'198 is also mounted on the pivot 196 and this arm is connected with the upper end of the lever v1.94 by a screw bolt 200 which is screwedinto the arm 198 loosely through the lever 194. A coiled spring 202tends to hold the arm 198 away from the lever 194 as far as the head of the bolt 200 will permit. The upper end of the arm 198'is provided with'a clamp 204 which holds a short rod 206. A linger 208. extends 206 and normally in- 190 is arranged to-come into contact with the roller 192 before the ski-passes. out from under the cutter 82. During this time, the finger 208 through the intervention of the spring 202 is'held resiliently down upon the rear portion of theski as shown in'Fig. 5. d An arm 210'secured to the rod 206 is provided with a hole 212 through which a bolt '214 passes loosely as shown in Fig.4. I When the finger 208 is moved shown inFig. 5, its downward movement is the arm 210 coming into engagement with 'the head of the bolt 214.

y referringto Fig. 2, will be seen'that the belt 34 under working bya belt'tightener 216 of ordinary construction which is carried by a lever 218 provided with a catch adapted to engage in notches of a segment member 220. When the lever 218 is thrown toward the left from the position shown in Fig. 2, thebelt 34is loosenedto such an extentthat it will not transmit motion and at the same time a brake 222 carried by the belt tightener is thrown. up against the pulley IS driven "by progressively and 'By referringto Fig. 3, it willbe .un

.60 so that the machine is stopped quickly."

The operation and advantages of my invention have to a large extent already been. disclosed. The feeding chains are driven at amoderate rate of speed bythe shaft 40 having a large gear 50 secured thereto and driven .by a small gear 48. g The rotary cutter82 is driven at ahigh rate of speed by the shaft 22 to which it is secured, this shaft being driven directly by the belt 18 from the motor 16 running at a high rate of speed The cam carrying wheel'166 is driven at a slower rate of'speedsynchronized with the speed of the feeding chains due to the fact that the shaft of this wheecarries a large gear 56 which and passes.

down, into the position,

conditions isv held taut smaller gears 54" derstood that am cam member l-68carried by thew-heel 166 is so shaped as to cause the In order to feedthe blanks B to the rotary just ahead of oneof 1 cutter, they are placed. the engaging members carriedby the feeding chains 72-while the engaging member is at thefront of the machine as 6..--It will be understood that the length of these chains.

the cam 190. will make rotations for each com-' cam wheel 166 and the same number of plete circuitofv thechains as the numberof the particular embodi cross plates 80; In 'mentlshow n, there are three of the cross plates 8'Q-an'd hence the shaft 58 and thecamscar- 'ried thereby will make the feeding chains. are going aroundonce and makingjone complete circuit. indicated, the cam member changed to take care of skis length. -.The cam 190, however, does notneed to be changed since this cam comesinto oper-' ation during the last operation for each ski.

' I claim:

A .skicutting machine comprising a rotary cutter, mechanism for" feedinga blank under saidcutter,mechanism for raising and lowering said cutter for thinnlng the forward and rearward portions of said cutter normally held above the blank, andmeans for bringing said device into engagement with the blank as the rear portion thereof is passing from said cutter.

i 2. Askicutting machine comprising a ro- 'tary cutter, mechanism for feeding a blank under said cutter, a cam carrying wheel-for three rotations while shown in Fig.

and the arrangement of gear; .1 ing are such that theshaft 52 carrying the :As previously '168 will be of different portion of thecutting loo 7 of the blank, "a pressure applying device adjacent the rear raisingand lowering said cutter for thinning the forward and rearward portionsgof the lank, a gear securedto the shaft of said" "wheel for driving the. latter, a pressure 7 ap-' plying device adjacent the rear of said cutter normally held above the'blank, and a cam sei cured to said-gear for bringing said device into engagement with the blank-as the rear portion thereof is'passing from said cutter.

3 A skicutting machin comprisinga rotary cutter, endless feeding of blanks and feeding the latter under said out and rearward portionsof the blanks, driving mechanism for the shaft of said wheel and for said chains which causes said wheel for chains, a number cross. plates CEIIIlGCl by said chains in spaced. relation. for engaging the rear ends of each complete circuit of said chains to rotate as many times as the number of said cross plates, a pressure-applying device adjacent the rear of said cutter normally held above the blanks, and a cam carri d by the shaft of said wheel for bringing said pressureapplying device into engagement with the blanks as the rear portions thereof are passing from said cutter. I 4. A ski cutting machine comprising a rotary cutter, endless feeding chains, a number of cross plates carried by said chains in spaced relation for engaging the rear ends of blanks and feeding the latter under said cutter, mechanism for raising and lowering said cutter for thinning the forward and rearward portions of the blank,ga pressure-applying device adjacent the rear of said cutter normally held above the blank, and means for xbringing said device intoengagement with the blank as the rear portion thereof is passing from said cutter. 7 5. A ski cutting machine comprising a rotary cutter, mechanism for feeding a blank- 5 undersaid cutter, mechanism for raising and lowering said cutter for thinning the forward and rearward portions of the blank, apivoted finger adjacent the rear of said cutter, a lever, a spring'connection between said lever and said finger, and a cam whichengages said lever and forces said finger resiliently into engagement with the blank as the rear por- 7 tion thereof is passing from said cutter.-

In testimony whereof I hereunto affix my signature.

v 7 JOHN E. ERICKSON. 

